\centering
\begin{tabular}[t]{lrr}
\toprule
Model & Log-likelihood & Perplexity\\
\midrule
Null & -72675 & 1.84\\
1-D (mix.) & -53047 & 1.58\\
2-D (no mix.) & -51983 & 1.57\\
2-D (mix.) & -51377 & 1.56\\
\bottomrule
\end{tabular}
